Fabricated insulation



Nov. 12, 1940. V M. s. GAZELLE 2,221,310

FABRI CATED INSULATION Filed Aug. '26, 1937 INVENTOR. (f/c; 6/6: a e/ka ATTORNEY.

Patented Nov. 12, 1940- UNITED STATES rnnmcnrnn INSULATION Michel S. Gazelle, Detroit, Mich,

assignor, by

mesne assignments, to Insulfoil Corporation of America, Detroit, Mich., a corporation of Michilan Application August 26, 1937, Serial No. 151,077

4Claims.

This invention relates to a fabricated insulation sheet, the object being to provide an insulation that is flexible and useable as a wrapper for objects it is desired to insulate, not only to shield 5 the article from heat or cold but to also prevent loss of heat or cold of an article or material enclosed by the sheet and to also provide an insulation sheet that may not only be used as a wrapper but may be shaped to form a bag for the carrying of material desired to be "insulated and thus act as a container for such material or useable as a lining for a box-like structure or shaped to provide a casing that may be introduced over an object as, for instance, a milk bottle. f A further object of the invention is to provide an insulation sheet of a flexible character which includes a sheet of bright metal foil on a surface of which is secured a sheet of transparent material such as Cellophane, a trade name for a paper-like material manufactured by E. I. Dupont de Nemours Company, of Wilmington, Delaware.

This sheet of Cellophane is embossed to provide a substantially uniform series of projections upon one side of the sheet and cup-shaped depressions 5 on the opopsite side, the said opposite side being secured to the metal foiland thereby providing dead air spaces and the projections being on the inside of the sheet serve to space the metal foil from the material enclosed within the sheet.

It is a further object of the invention to provide an insulation sheet which comprises an outer sheet of paper-like material, a sheet of bright metal foil, such as an aluminum foil, secured to the said paper and an embossed Cellophane sheet 35 upon the face of the metal foil, the embossing being of-a. character to provide dead air spaces between the Cellophane and the metal foil, and in an alternative form of such structure to provide a. transparent sheet of material such as Cellophane embossed to provide a series of projections on opposite faces of the Cellophane as is hereinafter more specifically described.

A further object and feature of the invention is 45 to provide avery cheap insulation sheet enabling the same to be used once and then discarded if desired, and thus-providing an insulating inaterial to be used for many purposes and in a manner not heretofore possible with previously 50 known insulating materials which include a metal foil as a heat reflecting surface.

These and other objects and the several novel features of the invention are hereinafter more fully described and claimed, and the preferred 55 form of construction of an insulating sheetembodying my invention is shown in the accompanying drawing in which-l Fig. 1 is a sectional perspective'view showing one form of my improved insulation sheet.

Fig. 2 is a similar view showing an alternative 5 form of construction.

Fig. 3. is a sectional perspective view of a boxlike container in which my improved insulation sheet is used as a lining.

Fig. 4 is an illustration of the manner of use 10 of my improved insulation sheet as a wrapper forv a bottle.

In the preferred form of construction of my improved insulating sheet, I provide a sheet of preferably paper-like material I of any approved 15 form-and dimension which is flexible in character such, for instance, as an ordinary wrapping paper. Upon one face of this sheet I is secured a bright metallic foil 2 which may be .an aluminum foil and to the outer face of the foil 20 sheet is secured, as by pasting thereto, a sheet of transparent paper-like material 3. Preferably, this sheet is formed of the well known Cellophane heretofore mentioned, which is impervious to air flow and to a very considerable degree impervious to moisture.

An essential character of insulation utilizing a bright metal fofl asa heat or cold reflecting surface is that the reflecting surface should be spaced from the material insulated. I accomplish this by embossing the sheet I to form a multiplicity of knob-like projections 4 preferably spaced uniformly over the sheet. The size of these projections is not material and may vary, depending upon the particular use to be made of the insulation.

For general use as a wrapping paper, the knobs of the embossed sheet are comparatively small and project from one side of the sheet only as will be understood from Fig. 1. This sheet being glued 40 or pasted to the 'face of the foil, there is provided a series of dead air cells 5 provided at the face of the foil sheet and thus preventing a flow of air thereacross. ,The surface of the foil sheet is surface of the sheet from becoming tarnished.

The purpose of the knobs is therefore two- It will'bereadilyseenthattheknobsv a bag similar tothe ordinary paper bags in use and for the carrying of a material which it is desired to prevent a loss of heat or cold as, for instance, hot bread rolls or wrapped ice cream etc. It may also be used for a simple wrapper as an ordinary paper is used or it may be shaped to provide an insulation cover for a milk bottle such as is indicated at 6 in Fig. 4. This wrapper may be made up in the form of an open ended tube of the necessary size, slipped over the bottle from the top and the "opposite ends turned over the bottle end as indicated at I. A rubber band may be applied about the neck of the bottle if desired to hold the insulation sheet from displacement. The insulation sheet may also be utilized as a liner for a-box as is indicated'in Fig. 3 wherein it will be seen that the knob ele- A ments 4 project inwardly and space the material in the box from the foil sheet 3. In this case, if desired, the paper sheet I may be pasted to the interior surface of the wall 9 of the box.

The invention is not confined to the use of Cellophane as the inner embossed sheet of material as most any more or less transparent paper-like material can be used but Cellophane is considered the better material due to the fact that it does not deteriorate in transparency through long periods of time and is more transparent than the usual waxed papers' although in many cases waxed or other character of paper may be utilized without departing from the spirit and scope of the invention as defined by the appended claims.

An alternative form of the invention is shown in Fig. 2. In this case I provide the same base sheet I and foil sheet 2 and to this is secured a transparent sheet such as a Cellophane sheet ID. This sheet is embossed to provide knobs H on one side alternating with knobs i2 on the opposite side. While this form does not provide dead air cells at the surface of the foil, it serves the purpose of spacing the foil sheet a greater distance from the material enclosed by the sheet and if used as a wrapper and the edges thereof crimped or turned as is suggested at l in Fig. 4, air flow is prevented to a material degree across the face of the foil. With the usual corrugated strawboard on which a foil sheet might be positioned, the spaces between the ribs forming the corrugations provide air channels causing a loss of heat or cold from the material enclosed by such form and further such commonly known corrugated strawboard is entirely too stiff to provide the desired flexibility which is secured a factor as it is sustained by'the walls of the 10 body to which it is preferably secured.

It is believed evident from the foregoing description, that the insulation sheet is inexpensive in character enabling it to beused in a multiiplicity of instances as a wrapperor as a con- 15 I tainer for a material to be shielded, and that the features and objects of the invention are attained by the structure described.

Having thus fully described my invention, its utility and mode of operation, what I claim and 20 desire to secure by Letters Patent of the United States is- 1. An insulation means comprising a sheet of paper, abright metal foil secured to the surface thereof, and a sheet of Cellophane having a series 25 of projections upon one face and a series of recesses opening through the other face, said other face being secured to the foil thereby closing the recesses and providinga series of dead H air spaces. 30

2. An insulation means comprising a sheet of pliable paper, a sheet of metal foil secured to the surface thereof. and a sheet of Cellophane glued to the foil surface, said Cellophane sheet having portions projecting from one side and providing recesses closed by the foil.

3. A pliable sheet ofinsulation comprising a 1 Cellophane sheet embossed to provide a series of separate spaced projections on one face and recesses opening through the other face, and a 40 metal foil secured to the last named face of the l embossed sheet and sealing the recesses to atmosphere.

4. An insulating means comprisinga pliable sheet of material, an aluminum foil on one face 45 thereof, and an embossed sheet of Cellophane secured to the foil, the embossing providing a series of spaced projections extending from one face of the sheet, and an equal number of projections alternating therewith projecting from 50 the other face of the sheet and the whole forming a pliable insulating sheet.

MICHEL s. GAZELLE. 

